Two dimensional radioactive films are a new and exciting system to study nuclear decay at the atomic level with applications in a variety of fields ranging from medical imaging to cancer therapy. Before these films can be used in real-world application however, their behaviour and stability under ambient conditions has to be understood. This study, which was done in collaboration between the experimental group of Prof. Sykes (Tufts University, USA) and the computational group of Prof. Michaelides (University College London, UK) addresses precisely that issue. Using X-ray photoelectron spectroscopy and scanning tunneling microscope experiments combined with density functional theory computations the authors were able to monitor the decay product, 125Te, over time with atomistic resolution. This work reveals not only that the radioactive films and the decay product are stable in air at ambient conditions, but also shows precisely what happens to these films over time. Freshly formed Te is bound very strongly to the gold substrate, even stronger than the radioactive iodine atoms, and oxidises to TeO2 in air. TeO2 units are able to diffuse through the films and tend to dimerize to (TeO2)2. The radioactive films as well as the decay products remain intact throughout these reactions. This crucial insight opens the door for a range of useful applications of two dimensional radioactive films on gold. Adsorbed on gold nanoparticles they could for example lead to highly targeted cancer therapy treatments.
Angelos set a new world record for the “fastest marathon dressed as a scientist (male)” at this year’s London Marathon, finishing in 3:22:51. Congratulations! He also managed to raise more than £3000 in support of WaterAid, an international charity working to provide clean water and decent toilets to people all over the world. Many thanks […]
The ICE group has a new member: Julia will be working on C-H activation at single-atom alloy catalysts. The project involves collaboration with Michail Stamatakis from UCL’s Department of Chemical Engineering. We hope you will have a pleasant and productive time in the ICE group!
In a recently published Nature Reviews Chemistry article, titled “Surface premelting of water ice”, Ben Slater and Angelos review the current understanding of the quasi-liquid layer (QLL) that forms on the surface of ice. The review describes how advances in experimental and computational techniques furthered our understanding in the years since Faraday first postulated the […]
Angelos will be running this year’s London Marathon with the aim of setting a new world record for the “fastest marathon dressed as a scientist (male)”. He is running in support of WaterAid, an international charity working to provide clean water and decent toilets to people all over the world. To find out more and […]
For his contribution “A Machine Learning Potential for Carbon”, Patrick was awarded a Best Poster prize at this year’s TYC Student Day! He was one of the four winners chosen from more than 30 poster presentations, which highlighted the excellent research conducted within the Thomas Young Centre. Patrick had also won the Best Poster prize […]
The proposal titled “New Frontiers for Material Modeling via Machine Learning Techniques with Quantum Monte Carlo” was awarded a 2019 Innovative and Novel Computational Impact on Theory and Experiment (INCITE) grant by the U.S. Department of Energy’s Office of Science. The project lead by Dario Alfè and in collaboration with Gábor Csányi in Cambridge involves […]
We are happy to welcome some new people who joined the group over the last few weeks. Tai is doing a postdoc in a joint UCL – BP project. Fabian is sharing his PhD time between UCL and Imperial College. Michael already did his Master project in our group and is now continuing his work […]
Congratulations to Martin, who finished his viva last week! His work focused on ice nucleation, in particular on finding descriptors that indicate good ice nucleating agents and the role of dynamical heterogeneity in homogeneous ice nucleation.
Yesterday morning’s adverse weather conditions (to put it mildly) made the triathlon even more challenging. The swimmers had to cope with very cold water, the hilly bike track was dangerously slippery and the running track was mostly covered in mud. Undeterred, both teams completed the triathlon – soaking wet (even the ones that didn’t swim!) […]
The next issue of The Journal of Physical Chemistry Letters will feature cover art from the perspective article ‘Lonely Atoms with Special Gifts: Breaking Linear Scaling Relationships in Heterogeneous Catalysis with Single-Atom Alloys’ by Matthew T. Darby, Michail Stamatakis, Angelos Michaelides, and E. Charles H. Sykes. The cover depicts the atomic structure of a so-called […]